We can argue all day about whether it's a bad idea for people to drive high. I never said it wasn't.

The point is that you can't really determine impairment by testing alkaloid levels or THC levels in the blood. IT IS NOT A RELIABLE INDICATOR!!!

So, yeah it may be a good idea to outlaw stoned driving, but there is no practical way to get a quantitative idea of how stoned someone is by looking at their blood alkaloid levels.

As was stated a few times already in this thread you could smoke on Monday and still have arrestable alkaloid levels on Wednesday. That is the point of this thread!!

I want to know what advocates of this law think about that!!!

A field sobriety test is really the only fair and rational way to do it without jeopardizing the rights of a all medical users!